Chapter 28 Burn it up Burn it up
Lou Xiao'e and Gao Zhendong have officially met. Gao Zhendong has a good impression of this "Siheyuan" celebrity, but also feels a little pitiful. On the surface, he is tough and aggressive, but in fact he is just a fool. Bai Tian, the kind who is often led by others.
Gao Zhendong could probably guess what she was here for, but he didn’t know if her family asked her to come or if she came secretly, so he simply asked directly: "You are not from the courtyard, why are you here? Why? Visiting relatives? "
Lou Xiao'e is very straightforward: "My mother wants to introduce someone to me, I will come over to see it myself."
Gao Zhendong asked knowingly: "Who is it? Maybe I know him, have you seen him?”
Lou Xiao'e's answer was completely unexpected by Gao Zhendong: "I didn't see it, I was too lazy to look. In fact, I didn't come here to see people, I just wanted to see the environment. Now that I have seen it, there is no need to look."
Gao Zhendong Strange: "This is the front yard. Did your mother introduce you to the front yard?" Gao Zhendong couldn't say that Xu Damao lived in the backyard, since you haven't seen the backyard yet.
Lou Xiao'e shook her head: "No, I heard that she lives in the backyard, so let's not talk about it. You said you are from a steel rolling mill, what does the steel rolling mill do?"
Gao Zhendong pointed out Pointing to her bookshelf: "Steel rolling mill technician, just assigned."
Lou Xiao'e estimated Gao Zhendong's age: "Then you started working late enough."
Gao Zhendong confessed honestly: "Yes, he is twenty-five years old. I used to fight in the war. After fighting the Citizen Devils, I was admitted to Pudaokou College. I just graduated."
Have Lou Xiao'e ever seen such Yunwen? Yun Wu, who has some legendary experience, his eyes sparkling, stretched out his hand to shake Gao Zhendong's arm: "Are you so powerful? Tell me, tell me."
Gao Zhendong raised his hand and looked at his watch: "Okay, but it's already lunch time. Let's go out for shabu-shabu and talk while we eat."
The two of them packed up and went to the street. Went.
After dinner time, Lou Xiaoe returned home and her mother greeted her: "Did you secretly go to South Tongluogu Lane? How was it, are you satisfied?"
Lou Xiao'e untied her scarf: "Mom, don't mind my business. I know what's going on."
Her mother was unhappy: "This is for your own good."
Lou Xiao'e changed her mind. Head: "Anyway, don't make arrangements for me."
Father Lou looked at Lou Xiao'e's expression, as if he understood something, and said to Lou's mother: "If the child doesn't like it, don't make any nonsense, Xiao'e." "E is still young, why are you so anxious?"
Lou Xiao'e smiled at his father and turned to go upstairs.
It's another Monday, and Gao Zhendong's thermocouple project team is preparing to bake the electrodes.
Gao Zhendong organized a meeting first to implement the progress of various tasks.
At Liangfa's place, the verification test design has been completed, and the comparative test design is in progress. However, the verification test was done at the beginning, and this progress is enough.
As for Yi Zhonghai’s machining, through the efforts of Gao Zhendong, Liang Fafa, and Yi Zhonghai, the first version of the machining design has been completed. Master Yi Zhonghai and Jia Dongxu took the drawings and used them. The eldest sister has processed part of the kit using the temporary materials she selected, and is processing the remaining parts in time for testing.
Sister Fang and Xiao Liu’s vacuum induction furnace is also ready. The materials in the material list given by Gao Zhendong are also ready, waiting for the input of materials for trial production.
Gao Zhendong said that he first imitated and then developed it himself. In fact, he wanted to get it right in one step. During the trial production process, he directly combined the imitation K-type (nickel-chromium-nickel-silicon) and self-developed N-type (nickel-chromium-silicon-nickel-silicon) thermoelectrics. Even the double electrodes are made.
Don’t look at it, just one word is missing, just this one word solves the problem of the thermal electromotive force of the nickel-chromium-nickel silicon thermocouple in the two temperature ranges of 300°C-500°C and around 800°C Unstable issues. Of course, it is not easy to realize this one-word difference, otherwise it would not have been until the 1970s that the N-type thermocouple officially appeared.
It is not Gao Zhendong’s style to procrastinate even though he knows the answer. This is different from those daily necessities that have no origin and are inconvenient to use. Original and new things do not need explanation. There is no need to explain the reason, it is the last word once it is done.
K-type and N-type electrode material ratios, Gao Zhendong prepared three types of positive and negative electrodes, a total of twelve types. During the test, the positive and negative electrodes of various ratios were crossed. Pairing trials to determine optimal pairings.
Among them, K-type has a positive electrode (KP) with a nickel-chromium ratio of 90:10, and a negative electrode (KN) with a nickel-silicon ratio of 97:3. This pair of positive and negative electrode materials is the correct answer for K-type.
Similarly, the N type has a positive electrode (NP) with a nickel-chromium-silicon ratio of 84.4:14.2:1.4, a negative electrode (NN) with a nickel-silicon ratio of 95.5:4.4, and 0.1 is the trace element magnesium , this pair of positive and negative electrode materials is the correct answer for N-type.
As for not preparing more confusing options, the reason is simple.
Firstly, because there is no need. Sometimes, some things can be explained and covered up by genius. Although this thing is copied from later generations, copying books for the benefit of the public can be called plagiarism. Well.
Secondly, Gao Zhendong wants to save time. He has to get the technical say in the shortest reasonable time. Otherwise, if he smokes good stuff later, others won't let him do it. That would be a pity. At the same time, there are also thermocouple high-temperature protection tube materials and things prepared for another matter, which were also solved this time.
Common manufacturing methods for nickel-based alloys include arc smelting, vacuum smelting, powder metallurgy, molten salt electrolysis, etc. Considering the existing conditions, Gao Zhendong finally chose the third further improvement, vacuum powder metallurgy. Law.
Specifically, the main steps are the following.
First select the appropriate raw material powder and mix it evenly according to a certain proportion.
Then the uniformly mixed raw material powder is put into a hot press and hot pressed into a billet under a certain temperature and pressure.
Then the alloy raw material billet is put into a vacuum induction furnace and sintered within a suitable temperature range, so that the raw materials in the alloy raw material billet undergo a solid-state diffusion reaction to generate the corresponding alloy structure.
Finally, the sintered billet is subjected to processing techniques such as molding, hot rolling, and drawing to make nickel-based alloy products of the required size and shape.
Of course, when necessary, heat treatment processes such as quenching, annealing, tempering and tempering can also be added to make the product easy to process or wear-resistant and resistant to fabrication.
In terms of time scheduling, Gao Zhendong arranged to start assembling and conducting verification tests as soon as a set of positive and negative electrodes were produced. After the verification test was completed, the positive and negative electrode groups were added to the comparative test.
In this case, the verification test can be carried out without waiting for the completion of the firing of all the ratios of positive and negative electrodes.
At the same time, the comparative test can be carried out after the verification test of the first two positive and negative electrode groups is completed. The progress of the entire comparative test will not lag too far behind the verification test, which is very time-saving.
Although this arrangement is only for the application of basic knowledge of future project management, it still greatly impressed the people in the project team. He even said that team leader Gao had a clear mind and organized things in an orderly manner.
In fact, in the 1950s, no one in China had a systematic understanding and application of this work organization method. It was not until the 1960s that the famous mathematician Mr. Hua Luogeng began to devote himself to the application and popularization of mathematics, applied mathematical methods to practice, conducted careful research on the two methods of "overall planning method" and "optimization method", and then used his own After the language expressed it in an easy-to-understand manner and vigorously promoted it, people realized and mastered this method, which greatly improved work efficiency.
After getting the preparation method, ratio list and work plan, the project team plunged into the work of electrode preparation and testing.
Electrode, burn it!
Because there are some easter eggs that change the style in the middle, today’s two chapters are posted together to prevent you from getting used to it after reading the other one, ^_^
(End of this chapter)